Symptom Related Diagnostic Procedures

Low Side Pressure Too High:

Low Side Pressure Too Low:

High Side Pressure Too High:

High Side Pressure Too Low:

1. Ambient temperature: 95°F (35°C).
2. Engine speed: 1500 rpm.
3. Blower speed control set at "HIGH."
4. Temperature control set at "COOL."

NORMAL SYSTEM PRESSURES
High Side 213 - 256 psi
Low Side 28 - 43 psi